EP1936999A1 - Method of setting a system time clock at the start of an MPEG sequence - Google Patents

Method of setting a system time clock at the start of an MPEG sequence Download PDF

Info

Publication number
EP1936999A1
EP1936999A1 EP08100760A EP08100760A EP1936999A1 EP 1936999 A1 EP1936999 A1 EP 1936999A1 EP 08100760 A EP08100760 A EP 08100760A EP 08100760 A EP08100760 A EP 08100760A EP 1936999 A1 EP1936999 A1 EP 1936999A1
Authority
EP
European Patent Office
Prior art keywords
apat
stc
packet
start
counter
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP08100760A
Other languages
German (de)
French (fr)
Other versions
EP1936999B1 (en
Inventor
Declan P. Kelly
Wilhelmus J. Van Gestel
Pieter B. Ijdens
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Koninklijke Philips NV
Original Assignee
Koninklijke Philips NV
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority to EP00200038 priority Critical
Application filed by Koninklijke Philips NV filed Critical Koninklijke Philips NV
Priority to EP08100760.1A priority patent/EP1936999B1/en
Priority to EP01905654.8A priority patent/EP1163802B1/en
Publication of EP1936999A1 publication Critical patent/EP1936999A1/en
Application granted granted Critical
Publication of EP1936999B1 publication Critical patent/EP1936999B1/en
Application status is Active legal-status Critical
Anticipated expiration legal-status Critical

Links

Images

Classifications

    • GPHYSICS
    • G11INFORMATION STORAGE
    • G11BINFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B27/00Editing; Indexing; Addressing; Timing or synchronising; Monitoring; Measuring tape travel
    • G11B27/005Reproducing at a different information rate from the information rate of recording
    • GPHYSICS
    • G11INFORMATION STORAGE
    • G11BINFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B27/00Editing; Indexing; Addressing; Timing or synchronising; Monitoring; Measuring tape travel
    • G11B27/02Editing, e.g. varying the order of information signals recorded on, or reproduced from, record carriers
    • G11B27/031Electronic editing of digitised analogue information signals, e.g. audio or video signals
    • G11B27/034Electronic editing of digitised analogue information signals, e.g. audio or video signals on discs
    • GPHYSICS
    • G11INFORMATION STORAGE
    • G11BINFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B27/00Editing; Indexing; Addressing; Timing or synchronising; Monitoring; Measuring tape travel
    • G11B27/10Indexing; Addressing; Timing or synchronising; Measuring tape travel
    • G11B27/102Programmed access in sequence to addressed parts of tracks of operating record carriers
    • G11B27/105Programmed access in sequence to addressed parts of tracks of operating record carriers of operating discs
    • GPHYSICS
    • G11INFORMATION STORAGE
    • G11BINFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B27/00Editing; Indexing; Addressing; Timing or synchronising; Monitoring; Measuring tape travel
    • G11B27/10Indexing; Addressing; Timing or synchronising; Measuring tape travel
    • G11B27/19Indexing; Addressing; Timing or synchronising; Measuring tape travel by using information detectable on the record carrier
    • G11B27/28Indexing; Addressing; Timing or synchronising; Measuring tape travel by using information detectable on the record carrier by using information signals recorded by the same method as the main recording
    • GPHYSICS
    • G11INFORMATION STORAGE
    • G11BINFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B27/00Editing; Indexing; Addressing; Timing or synchronising; Monitoring; Measuring tape travel
    • G11B27/10Indexing; Addressing; Timing or synchronising; Measuring tape travel
    • G11B27/19Indexing; Addressing; Timing or synchronising; Measuring tape travel by using information detectable on the record carrier
    • G11B27/28Indexing; Addressing; Timing or synchronising; Measuring tape travel by using information detectable on the record carrier by using information signals recorded by the same method as the main recording
    • G11B27/30Indexing; Addressing; Timing or synchronising; Measuring tape travel by using information detectable on the record carrier by using information signals recorded by the same method as the main recording on the same track as the main recording
    • G11B27/3027Indexing; Addressing; Timing or synchronising; Measuring tape travel by using information detectable on the record carrier by using information signals recorded by the same method as the main recording on the same track as the main recording used signal is digitally coded
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04NPICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/20Servers specifically adapted for the distribution of content, e.g. VOD servers; Operations thereof
    • H04N21/23Processing of content or additional data; Elementary server operations; Server middleware
    • H04N21/242Synchronization processes, e.g. processing of PCR [Program Clock References]
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04NPICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/40Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
    • H04N21/41Structure of client; Structure of client peripherals
    • H04N21/414Specialised client platforms, e.g. receiver in car or embedded in a mobile appliance
    • H04N21/4147PVR [Personal Video Recorder]
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04NPICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/40Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
    • H04N21/43Processing of content or additional data, e.g. demultiplexing additional data from a digital video stream; Elementary client operations, e.g. monitoring of home network, synchronizing decoder's clock; Client middleware
    • H04N21/4302Content synchronization processes, e.g. decoder synchronization
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04NPICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/40Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
    • H04N21/43Processing of content or additional data, e.g. demultiplexing additional data from a digital video stream; Elementary client operations, e.g. monitoring of home network, synchronizing decoder's clock; Client middleware
    • H04N21/4302Content synchronization processes, e.g. decoder synchronization
    • H04N21/4305Synchronizing client clock from received content stream, e.g. locking decoder clock with encoder clock, extraction of the PCR packets
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04NPICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/40Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
    • H04N21/43Processing of content or additional data, e.g. demultiplexing additional data from a digital video stream; Elementary client operations, e.g. monitoring of home network, synchronizing decoder's clock; Client middleware
    • H04N21/433Content storage operation, e.g. storage operation in response to a pause request, caching operations
    • H04N21/4334Recording operations
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04NPICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/40Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
    • H04N21/43Processing of content or additional data, e.g. demultiplexing additional data from a digital video stream; Elementary client operations, e.g. monitoring of home network, synchronizing decoder's clock; Client middleware
    • H04N21/434Disassembling of a multiplex stream, e.g. demultiplexing audio and video streams, extraction of additional data from a video stream; Remultiplexing of multiplex streams; Extraction or processing of SI; Disassembling of packetised elementary stream
    • H04N21/4344Remultiplexing of multiplex streams, e.g. by modifying time stamps or remapping the packet identifiers
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04NPICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/80Generation or processing of content or additional data by content creator independently of the distribution process; Content per se
    • H04N21/83Generation or processing of protective or descriptive data associated with content; Content structuring
    • H04N21/845Structuring of content, e.g. decomposing content into time segments
    • H04N21/8455Structuring of content, e.g. decomposing content into time segments involving pointers to the content, e.g. pointers to the I-frames of the video stream
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04NPICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N9/00Details of colour television systems
    • H04N9/79Processing of colour television signals in connection with recording
    • H04N9/80Transformation of the television signal for recording, e.g. modulation, frequency changing; Inverse transformation for playback
    • H04N9/804Transformation of the television signal for recording, e.g. modulation, frequency changing; Inverse transformation for playback involving pulse code modulation of the colour picture signal components
    • H04N9/8042Transformation of the television signal for recording, e.g. modulation, frequency changing; Inverse transformation for playback involving pulse code modulation of the colour picture signal components involving data reduction
    • GPHYSICS
    • G11INFORMATION STORAGE
    • G11BINFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B2220/00Record carriers by type
    • G11B2220/20Disc-shaped record carriers
    • G11B2220/25Disc-shaped record carriers characterised in that the disc is based on a specific recording technology
    • G11B2220/2537Optical discs
    • G11B2220/2562DVDs [digital versatile discs]; Digital video discs; MMCDs; HDCDs
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04NPICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N5/00Details of television systems
    • H04N5/76Television signal recording
    • H04N5/78Television signal recording using magnetic recording
    • H04N5/782Television signal recording using magnetic recording on tape
    • H04N5/783Adaptations for reproducing at a rate different from the recording rate
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04NPICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N5/00Details of television systems
    • H04N5/76Television signal recording
    • H04N5/84Television signal recording using optical recording
    • H04N5/85Television signal recording using optical recording on discs or drums

Abstract

Method to enable a local system time clock counter (STC) of a receiving recording device to lock to program clock reference (PCR) information comprised in a received real time sequence of information signal packets, such as MPEG2 Transport Stream packets. The method comprising determining the number of cycles between arrival of the first information signal packet and the arrival of the information signal packet comprising the first Program Clock Reference (PCR) information. This information is stored as an attribute of the stored sequence.

Description

  • The invention relates to a method according to the preamble of claim 1. The method further relates to a recording apparatus according to the preamble of claim 7 and a reproducing apparatus according to the preamble of claim 8.
  • Digital information signals representing a real time stream of A/V information, such as an MPEG encoded Transport Stream, comprise time base information of the transmitting site. In case of an MPEG encoded Transport Stream the time base information is specified by Program Clock Reference (PCR) signals, transmitted regularly within a Transport Packet (TP). This time base information is used to lock a local clock at a receiving site to the clock at the transmitting site. However, this time base information is not sent with every Transport Packet (TP). This has a consequence that at start-up a local clock may not yet be locked by this time base information. This means that it is not known, with respect to Transport Packets (TP) arriving before locking, at which instant these Transport Packets (TP) have to be decoded (in case of Access Units (AU) with a Decoding Time Stamp (DTS)) or to be presented (in case of Access Units (AU) with a Presentation Time Stamp PTS)).
  • Further, in case discontinuities occur in a real time stream due to concatenation of different streams of different programs with a mutually different time base after for instance editing, the correct timing after such a discontinuity should be restored when starting processing the Transport Packets of a second sequence. However, the Packet Arrival Time (PAT) timestamp counter will be discontinuous after such a discontinuity.
  • In consequence, amongst other things, it is an object of the invention to obviate the above-mentioned disadvantages. According to one of its aspects a method according to the invention is characterized by the characterizing part of claim 1, a recording apparatus by the characterizing part of claim 7 and a reproducing apparatus by the characterizing part of claim 8.
  • Calculating the value of System Time Clock of the first information signal packet improves the playback performance and simplifies processing during playback.
  • These and further aspects and advantages of the invention will be discussed in more detail hereinafter with reference to the disclosure of preferred embodiments, and in particular with reference to the appended Figures that show:
    • Fig. 1 schematically a sequence of a stream of MPEG Transport Packets during start-up;
    • Fig. 2 a discontinuity between two sequences of a stream of MPEG Transport Packets;
    • Fig. 3 time stamp generator means in a recording/reproducing apparatus during recording according to the invention;
    • Fig. 4 an example of recording Transport Packets at start-up of a sequence according to the invention;
    • Fig. 5 time stamp generator means in a recording/reproducing apparatus during playback according to the invention,
    • Fig. 6 an example of recording Transport Packets during a discontinuity;
    • Fig. 7 shows a recording apparatus employing the time stamp generator means of Fig. 3,
    • Fig. 8 shows a reproducing apparatus employing the time stamp generator means of Fig. 5,
    • Fig. 9 illustrates an advantageous embodiment of the invention for reading data from a stream of encoded data for trickplay,
    • Fig. 10 illustrates a random access in a stream of MPEG 2 Transport Stream data after a PID change, and
    • Fig. 11 illustrates trickplay of a stream of MPEG 2 Transport stream data after a PAT/PMT change.
  • Fig. 1 illustrates a sequence of MPEG Transport Packets (TS packet). The sequence starts with a first TS packet 1. The TS packets 2 constitute an encoded Access Unit 3 to be presented as a decoded Presentation Unit 4 at a time specified by a corresponding Presentation Time Stamp (PTS). This Access Unit 3 is received before a local System Time Clock at a receiving site, such as a 27 MHz PLL, is locked to the time base information comprised in the stream. This Program Clock Reference (PCR) is first received with the TP packet 5. Therefore it is not known when the Access Unit 4 should be presented as the Presentation Time Stamp (PTS) points to time interval before the arrival of the first Program Clock Reference (PCR).
  • Fig. 2 illustrates a discontinuity in a stream of MPEG Transport Packets (TS packets). A first sequence 6 of TS packets is followed by a second sequence 7 of TS packets. Each sequence having it own time base information or Program Clock Reference (PCR). This situation might occur after editing of a stream. The Packet Arrival Time counter is therefore discontinuous. The last Access Unit (AU) constituted by the TS packets 8 of the first sequence is presented as a Presentation Unit 9 seamlessly with other Presentation Units 10, 11 and 12 from the second sequence. However, the first TS packet with Program Clock Reference (PCR) of the second sequences 7 arrives with TS packet 13 while the TS packet 14 to be presented is received prior. Therefore, the local System Time Clock is not yet locked to the PCR of the second sequence.
  • Fig. 3 illustrates time stamp generator means 15 in a recording/reproducing apparatus according to a first embodiment of the invention. A 27 MHz Voltage Controlled Oscillator 16 controls the System Time Counter (STC) 17, which is set to an arbitrary value during start-up and counts in an MPEG way (like PCR, PTS, DTS) As soon as the first Program Clock Reference (PCR) information arrives, the System Time Counter (STC) 17 is set to the value of this Program Clock Reference (PCR). Further locking is achieved by a phase detector that compares the received Program Clock Reference (PCR) information with the System Time Counter (STC) value. The phase difference is used, via a Low Pass Filter (LPF) 19, to the Voltage Controlled Oscillator (VCO) 16, constituting a Phase Locked Loop (PLL). The System Time Clock is used to control a binary Application Packet Arrival Time (APAT) counter 20 for generating corresponding APAT time stamps.
  • During start-up the APAT counter 20 starts at an arbitrary value. APAT time stamps are appended to every received TS packet. The time stamps represent the arrival time of the TS packets. The APAT[start] time stamp of the first TS packet of a sequence and also the APAT[PCR] timestamp of the TS packet which contains the Program Clock Reference (PCR) is stored temporarily in memory means. The number of 27 MHz cycles between the two time stamps is calculated by subtracting APAT[start] from APAT[PCR]. With the difference the start of the System Time Counter (STC-start) is calculated by subtracting this difference from the first received PCR-value. STC-start is the value the STC-counter 17 would have if it were locked from the beginning. STC-start is preferably stored as segment attribute when storing the MPEG stream on a recording medium, such as a disc.
  • Fig. 4 shows an example of playback of Transport Packets at start-up of a sequence according to the invention. Shown are irregular received TS packets 21, the arrival time of the TS packets 21 given by the APAT time stamp. The timing between the TS packets 21 should be kept constant on a digital interface during playback. The Start Segment 22 does not need to start with a Program Clock Reference (PCR), this information is received later with TS packet 23. The repetition frequency of the Program Clock Reference (PCR) information could be 100 ms with a recommendation of 40 ms. The received TS packets 21 are temporarily stored in smoothing buffer 24. This causes a start-up delay until the Presentation Unit (PU) 25 given by the Access Unit (AU) 26 comprising corresponding TS packets 21, is presented. It is noted that this delay is needed if the APAT timing of the stream is to be kept.
  • From the content of a smoothing buffer 24 the original timing can be reconstructed during playback, which is shown with reference to Fig. 5. Fig. 5 shows time stamp generator means for generating the correct timing of a recorded stream of TS packets recorded in accordance with the invention, as illustrated with reference to Fig. 4. The disclosed embodiment has a great similarity with the embodiment disclosed in Fig. 3, reference numeral are therefore identical. The difference being the ability of setting the System Time Clock (STC)-counter 17 and the Application Packet Arrival Time (APAT) counter 20. Immediately after starting, the System Time Counter (STC) 17 is set with the STC-start value, which has been stored in the segment attribute for instance, as discussed previously. From this moment the System Time Counter (STC) 17 is locked to the Program Clock Reference (PCR). The Application Packet Arrival Counter (APAT) 20 is set with the Application Packet Arrival Time (APAT) time stamp from the first TS packet. TS packets are retrieved from the smoothing buffer 24 at the time which is indicated by the Application Packet Arrival Time (APAT) time stamp. It is noted that for an internal decoder it is not needed but on the interface the stream should start with an inserted Program Clock Reference (PCR) packet to replace the STC-start.
  • Fig. 6 shows an example of recording Transport Packets during a discontinuity. The Application Packet Arrival Timestamps (APAT) of the first sequence 27 and the second sequence 28 are discontinuous at the connection point. The offset between both counters should be calculated. Then the correct timing can be reconstructed in a smoothing buffer. Shown is an Access Unit (AU) 32, constituting the last segment to be presented as Presentation Unit 29, from the first sequence 27. A subsequent Presentation Unit (PU) 30, corresponding to the first Access Unit (AU) 33 of the second sequence 28 follows. The Presentation Unit (PU) 29 comprises a Presentation Time Stamp PTS-1 with reference to a first local System Time Counter STC-1. The Presentation Unit (PU) 30 comprises a Presentation Time Stamp PTS-2b with reference to a second local System Time Counter STC-2. It is assumed that the connection point is of the C-type, implying that by definition there are no buffer problems after the discontinuity, there is no overlap in APAT time stamps from a first and second segment and the presentation units 29 and 30 are presented seamlessly.
  • From the fact that the presentation is seamless, it is known when on the local time base STC-1, the first presentation unit 30 of the second segment should be presented : PTS-1e+T. From the first presentation unit 30 of the second segment it is known when this presentation unit should be presented on the local time base STC-2 : PTS-2b. The number of clock cycles between the arrival time of the first TS packet and the presentation time is known : PTS-2b - STC-start(2). So it can be calculated at what moment in the local time base STC-1 the local time base STC-2 should set to STC-start(2).
  • It is remarked that an overlap is needed for STC-1 and STC-2 in a decoder (about 1 second)
  • Fig. 7 shows a recording apparatus with an input terminal 34 and receiving means 35 for recording received information signals representing Transport Packets. A packet detector 36 detects the arrival of the received Transport Packets and the embedded Program Clock Reference (PCR) signals. A Time Stamp Generator 15, as disclosed with reference to Fig. 3, as locked with its local System Time Counter to the Program Clock Reference (PCR) signals. At start-up the Time Stamp Generator 15 is set to an arbitrary value for setting the local System Time Counter as disclosed with reference to Fig.3. The generated Time Stamps, together with the System Time Counter start value (STC-start), is combined with the received Transport Packets in a combining unit 38. The combined signals are channel encoded with channel encoding means 39 and recorded on a record carrier 40 by writing means 41. The record carrier may be of the disc like type in which case it is rotationally driven by rotating means 42 while a recording writing beam is displaced in a radial direction by translating means 43. The record carrier 40 may be of the optical type, such as a recordable CD, DVD. In this case the writing means 41 generates a laser beam for writing and comprises suitable focussing means. In another embodiment the record carrier 40 may be of the magnetic type, such a magnetic disc.
  • Fig. 8 shows a reproducing apparatus adapted to scan a recording medium 40, recorded in accordance with the method of the invention, with a reading beam with suitable reading means 44. In case if the record carrier 40 is of the optical type, such as a CD, DVD, the reading means comprises a laser beam and corresponding focussing means to scan the record carrier 40. The detected signal is channel decoded by channel decoding means 45. The decoded Transport Packets with Time Stamps are supplied to demultiplexing means 46 for separating the Time Stamps from the Transport Packets. The Time Stamp are supplied to comparator means 38. The generated Time Stamp value generated by the Time Stamp generating means 37, such a disclosed with reference to Fig. 5, is also supplied to this comparator means 8. A recorded System Time Clock start value (STC-start) is submitted to the Time Stamp generating means 37, for locking the Time Stamp Counter to this value whenever necessary, in accordance with the method according to the invention. The generated Time Stamp value is compared with the recorded and extracted Time Stamp values. When both coincide, the corresponding Transport Packet stored in buffer memory 47 is submitted to outputting means 48, for generating a real time stream of Transport Packets at output terminal 49.
  • As mentioned before, the Transport Packets may comprise real time A/V information. A combined recording and reproducing device, such as described with reference to Fig. 7, respectively Fig. 8, may be used as a disk based video recorder. For user convenience it may be allowed to a user to set marks on key points within the recorded A/V program in order to indicate key scenes, commercial ends and so on. These key points are typically chosen to be video entry points, such as I-frames in MPEG2. However, to allow the playback device to decode the video at these points, additional information is needed.
  • It is remarked that a complete description of the MPEG2 format can be found in the corresponding international standards ISO/IEC 13818. I-frames are intra encoded frames frames that can be decoded independently from each other, this in contrast to P-frames that are predictive encoded and need a previous P- or I-frame. Further B-frames or bidirectional frames can be distinguished that need a preceeding and succeeding I- or P-frame to encode.
  • An advantageous embodiment is obtained by storing additional information with the mark point to allow decoding at the mark point. If this is not done, it may take some time (1-2 seconds) before correct decoding begins and this part of the video will not be displayed correctly.
  • For an MPEG2 Transport Stream, the mark point should store the following information : the Program Clock Reference (PCR) at the entry point, the Presentation Time Stamp (PTS) of the I-frame, the Decoding Time Stamp (DTS) of the I-frame and the Packet Identification (PID) mapping for the stream. This information allows a decoder to start decoding correctly from the mark point.
  • To perform trickplay, that is reproducing video with a speed different from the normal playback speed, on a digital video stream of the MPEG2 type as described above, requires extracting and decoding only parts of the video stream and discarding the rest. In many cases, such as for example with DVD, pointers are provided to both the start of the required data and to the end of the required data without parsing the stream. An advantageous method and embodiment will be discussed in case where the end of the required data is not stored, necessitating a reproducing device to parse the stream to find out which parts should be discarded.
  • If a reproducing device does not know where the end of the trickplay information is in the stream, then a simple approach is to read all the stream data from the start point to the next start point. This increases the amount of device memory required to perform trickplay and increases the performance requirements of a record carrier. The advantageous method and embodiment disclosed hereinafter provides a way to reduce the amount of data that needs to be read from the record carrier and to be stored in a device memory.
  • Two types of trickplay are considered. The first is one where only I-frames are read from the stream and the second one where I-frames and some P-frames are read. It is assumed that the location of the start of the I-frames are stored but not the end and not any P-frame points.
  • The basic insight underlying the adavantageous embodiment and method, is that instead of reading a complete Group of Pictures (GOP) to get the I-frame, only a fraction of the GOP is read, based on an estimate for the size of the I-frame. A Groups of Pictures (GOP) is defined in the MPEG2 format (ISO/IEC 13818) and comprised at least one I-frame and one or more P- or B-frames. For example, in a section of a DVD disc, the average I-frame size may be 28 sectors and the average GOP size may be 199 sectors. This leads to choose to read out one quarter (50 sectors) of the GOP to get the I-frame. This is almost twice the average so it could be enough in the worst case. The estimate used should be based on measurements of broadcast streams and may differ for HDTV streams and SD streams.
  • The same approach works for trickplay using P-frames as well as I-frames. In this case the percentage of the GOP to read will be larger.
  • From the Characteristic Point Information for trickplay, such as for example disclosed in the International Patent Application with Application Number EP99/08285 (PHN 17161), the Presentation Time Stamp (PTS) of the I-frame and the next I-frame are known. This enables the calculation the number of frames in a GOP. This may be advantageously used to modify the general estimate for each specific GOP structure.
  • With this approach it may occur in some cases that the complete I-frame cannot be read. If this happens occasionally, it is no problem. It just means that the trickplay refresh rate will be reduced.
  • If reading a stream with 1-frames that are consistently bigger than estimated, will result in bad looking trickplay performance. To avoid this the algorithm is made adaptive. For example, if it found that two I-frames within a given time period are bigger than estimated, the percentage of the GOP read is increased. If this continues to happen, the percentage of GOP read is increased again. This algorithm should converge very quickly on a value that is big enough. It is also possible to adaptively reduce the amount of data being read. This may be particular useful if P-frames are used for trickplay in a stream without B-frames.
  • Particular encoders and hence particular streams tend to be very regular in the relative size of the pictures they use. Also encoders normally stick to a fixed GOP size. Therefore, this adaptive approach should be very effective in practice. Using the Presentation Time Stamp (PTS) time in the Characteristic Point Information (CPI) to calculate the number of pictures in the GOP ensures that this method will also work for irregular GOP structures.
  • Alternatively, the stream could be parsed during record for I-end and the percentage of the GOP to be read on trickplay could be stored to get the I-frame. This value could used as the worst case size or as a value big enough to ensure getting the complete I-frame in 95 % or 99 % of the cases.
  • This method will work equally well for multiple video streams in a single program. In this case the percentage of the GOP to be read will be the same but actual amount will be larger.
  • Fig. 9 shows an example of a stream 53 of encoded MPEG2 data, the arrows 50 indicating the entry points stored in the Characteristic Point Information (CPI). Without knowing the I-end points, a reproducing device according to the invention does not need to read until the next entry points 50 during trickplay. Note that the amount 51 of data read depends on the amount of data in the GOP.
  • Next an advantageous embodiment will be discussed to handle Packet Identification (PID) changes in a recording device when receiving a stream of Information Signal Packets such as MPEG 2 Transport Streams. This may occur for instance with digital TV broadcasts based on MPEG 2 Transport Streams. Packet Identifiers (PIDs) or used to identify different streams with a multiplex of streams. For example, there may be a PID for video, a PID for audio, a PID for timing information and a PID for teletext information. In the case of a broadcast where there are multiple video streams or audio streams within a single program, there will be a PID for each video stream and for each audio stream. During a digital TV broadcast the PIDs may change with either new PIDs replacing the old PIDs or a change in the correspondence between PIDs and streams. A change in the PID mapping is signaled by Program Association Table (PAT) and Program Map Table (PMT) in the MPEG Transport Stream. Therefore, if the digital TV broadcast is processed as a stream, the decoding device will know when the PIDs change and will know the new PID mapping.
  • It is remarked that according to the MPEG 2 standard, a Program Association Tabel (PAT) maps program identities to their program transport streams. The PAT indicates the PID of the bitstream containing the Program Map Table (PMT) for a program.
  • A problem is that when a digital TV signal is recorded, it will not always be played back completely from start to finish. The playback device may jump within a stream (random access) or it may select only parts of a stream for decoding (trickplay). Therefore, the playback device may not know that the PID mapping has changed before it starts to decode the stream. For example, during trickplay the audio is normally filtered out of the stream. If the correct PID mapping is not known then it will not be possible to filter the audio and in some cases it could result in the video being filtered instead (if the audio and video PIDs are switched). Also a recording device may introduce additional PID changes due to editing.
  • The method and embodiment according to the invention comprising storing meta-data about a recording to record the points where the PIDs change. Also the new PID mapping will be stored. For each PID change at least the following information should be stored :
  1. 1) the time within the stream where the PIDs change,
  2. 2) the location within the stream where the PIDs change, for example by referring to the Transport Stream (TS) packet where the new PIDs are used,
  3. 3) the Program Number,
  4. 4) the Program Clock Reference (PCR) PID,
  5. 5) the Video PIDs,
  6. 6) the Audio PIDs.
  • In the case of multiple video streams or multiple audio stream, the correspondence between the streams should be stored. For example, this can be made implicit. The order of the streams in the structure defines their correspondence.
  • Fig. 10 illustrates the case of random access in an audio or video stream 54, such as an MPEG 2 Transport Stream, after a PID change 55. When the playback device jumps to an entry point 56 in the stream it needs to know the PID mapping to begin decoding and presenting the data. The PAT/PMT tables that define the PID mapping are repeated within the stream but they will not in general be present just before an entry point. By looking up the meta data that records the PID changes, the playback device can see what the correct PIDs are for this part of the program and so multiplex and decode the stream correctly. In the case of multiple video streams or multiple audio streams, the playback device can ensure that it presents the video stream that correctly corresponds to the previous displayed one if applicable. If the stream is being sent over a digital interface then the playback device can use the meta data to insert a new PAT and PMT table to indicate the new PID mapping.
  • Fig. 11 illustrates trick play of an audio or video stream 57 after a PAT/PMT table change 58. The trick play data to be reproduced is indicated with portions 59. The meta data defining the PID mapping allows the playback device to filter out non-video streams and ensure that the trickplay uses the correct video stream in the case of mutiple video streams. If the trickplay stream is being sent over an interface, then the video PID can be remapped during playback, then when normal play is resumed, the playback device can insert a new PAT and PMT to indicate the new PID mapping.
  • Although the invention has been described with reference to preferred embodiments thereof, it is to be understood that these are not limitative examples. Thus, various modifications thereof may become apparent to those skilled in the art, without departing from the scope of the invention, as defined by the claims. The invention may be implemented by means of both hardware and software, and that several "means" may be represented by the same item of hardware. Further, the invention lies in each and every novel feature or combination of features. It is also remarked that the word "comprising" does not exclude the presence of other elements or steps than those listed in a claim. Any reference signs do not limit the scope of the claims.
  • Claims (2)

    1. Method of generating Application_Packet Arrival Time Stamp (APAT), of a received real time sequence of information signal packets (TS packet) comprising A/V information, such as MPEG2 Transport Stream packets,
      the sequence comprising at intervals of multiple information signal packets Program Clock Reference (PCR) information for locking a local System Time Counter (STC) to time base information in the sequence, the method comprising
      determining a packet arrival time of each packet using an Application_Packet Arrival Time Stamp (APAT) counter (20) derived from a local System Time Counter (STC) (17), and appending a corresponding Application Packet Arrival Time Stamp (APAT), to received information signal packets,
      characterized by
      setting Application_Packet Arrival Time Stamp (APAT) counter (20) at an arbitrary value before receiving a first information signal packet,
      temporarily storing the Application_Packet Arrival Time Stamp (APAT) of the first information signal packet of the sequence (1) and of the first information signal packet comprising Program Clock Reference (PCR) information (5),
      determining a number of counts of the local System Time Clock Counter (STC) between said Application_Packet Arrival Time Stamps (APAT),
      subtracting this number from the Program Clock Reference (PCR) value to retrieve a System Time Counter start value (STC-start),
      storing on a record carrier (40) the sequence of information signal packets with the appended Application Packet Arrival Time Stamps (APAT) and storing on the record carrier (40) the System Time Counter start value (STC-start) as an attribute of the stored sequence.
    2. Method of reproducing a stored real time sequence of information signal packets (TS) comprising A/V information, such as MPEG2 Transport Stream Packets, the information signal packets further comprising stored Application Packet Arrival Time Stamps (APAT), the Application Packet Arrival Time Stamps (APAT) indicated the time when the corresponding packet has been received by a recording apparatus,
      the record carrier further comprising stored thereon a System Time Counter start value (STC-start), the System Time Counter start value (STC-start) corresponding to a Program Clock Reference (PCR) value reduced by a difference between an Application Packet Arrival Time Stamp (APAT) of the first information signal packet comprising the Program Clock Reference (PCR) and an Application Packet Arrival Time Stamp (APAT) of a first packet in the sequence,
      the System Time Counter start value (STC-start) stored as an attribute of the sequence
      the method comprising
      - running an Application Packet Arrival Time Stamp (APAT) counter (20) derived from a local System Time Counter (STC) (17),
      - locking the local System Time Counter (STC) to retrieved Program Clock Reference (PCR) information,
      - retrieving information signal packets and their corresponding stored Application Packet Arrival Time Stamps (APAT) from the record carrier (40),
      - temporally storing a number of retrieved information signal packets,
      - outputting an information signal packet when the corresponding stored Application Packet Arrival Time Stamp (APAT) coincides with the Application_Packet Arrival Time (APAT) Counter (20),
      the method characterized by,
      - retrieving the System Time Counter start value (STC-start) from the record carrier (40),
      - setting the System Time Counter (STC) with the retrieved System Time Counter start value (STC-start).
    EP08100760.1A 2000-01-10 2001-01-05 Method of setting a system time clock at the start of an MPEG sequence Active EP1936999B1 (en)

    Priority Applications (3)

    Application Number Priority Date Filing Date Title
    EP00200038 2000-01-10
    EP08100760.1A EP1936999B1 (en) 2000-01-10 2001-01-05 Method of setting a system time clock at the start of an MPEG sequence
    EP01905654.8A EP1163802B1 (en) 2000-01-10 2001-01-05 Method of setting a system time clock at the start of an mpeg sequence

    Applications Claiming Priority (1)

    Application Number Priority Date Filing Date Title
    EP08100760.1A EP1936999B1 (en) 2000-01-10 2001-01-05 Method of setting a system time clock at the start of an MPEG sequence

    Related Parent Applications (2)

    Application Number Title Priority Date Filing Date
    EP01905654.8A Division EP1163802B1 (en) 2000-01-10 2001-01-05 Method of setting a system time clock at the start of an mpeg sequence
    EP01905654.8A Division-Into EP1163802B1 (en) 2000-01-10 2001-01-05 Method of setting a system time clock at the start of an mpeg sequence

    Publications (2)

    Publication Number Publication Date
    EP1936999A1 true EP1936999A1 (en) 2008-06-25
    EP1936999B1 EP1936999B1 (en) 2016-12-21

    Family

    ID=8170891

    Family Applications (3)

    Application Number Title Priority Date Filing Date
    EP01905654.8A Active EP1163802B1 (en) 2000-01-10 2001-01-05 Method of setting a system time clock at the start of an mpeg sequence
    EP08100760.1A Active EP1936999B1 (en) 2000-01-10 2001-01-05 Method of setting a system time clock at the start of an MPEG sequence
    EP08100769A Withdrawn EP1926323A3 (en) 2000-01-10 2001-01-05 Method of setting a system time clock at the start of an MPEG sequence

    Family Applications Before (1)

    Application Number Title Priority Date Filing Date
    EP01905654.8A Active EP1163802B1 (en) 2000-01-10 2001-01-05 Method of setting a system time clock at the start of an mpeg sequence

    Family Applications After (1)

    Application Number Title Priority Date Filing Date
    EP08100769A Withdrawn EP1926323A3 (en) 2000-01-10 2001-01-05 Method of setting a system time clock at the start of an MPEG sequence

    Country Status (9)

    Country Link
    US (2) US8098973B2 (en)
    EP (3) EP1163802B1 (en)
    JP (2) JP4773664B2 (en)
    CN (4) CN1606357A (en)
    BR (1) BRPI0103897B1 (en)
    ES (1) ES2601140T3 (en)
    MY (1) MY147128A (en)
    PL (1) PL222487B1 (en)
    WO (1) WO2001052554A1 (en)

    Families Citing this family (44)

    * Cited by examiner, † Cited by third party
    Publication number Priority date Publication date Assignee Title
    CN1606357A (en) * 2000-01-10 2005-04-13 皇家菲利浦电子有限公司 Method of setting system time clock at start of mpeg sequence
    EP1286538A3 (en) * 2001-08-23 2004-10-06 Thomson Licensing S.A. Method for DVD recording of a data stream and DVD recorder
    EP1292124A1 (en) * 2001-08-23 2003-03-12 Deutsche Thomson-Brandt Gmbh Method for DVD recording of a data steam and DVD recorder
    US8352983B1 (en) 2002-07-11 2013-01-08 Tvworks, Llc Programming contextual interactive user interface for television
    US8220018B2 (en) 2002-09-19 2012-07-10 Tvworks, Llc System and method for preferred placement programming of iTV content
    US8042132B2 (en) 2002-03-15 2011-10-18 Tvworks, Llc System and method for construction, delivery and display of iTV content
    WO2003026275A2 (en) 2001-09-19 2003-03-27 Meta Tv, Inc. Interactive user interface for television applications
    KR100563685B1 (en) * 2002-02-25 2006-03-28 엘지전자 주식회사 Method for managing a playlist in rewritable optical medium
    US8676025B2 (en) 2002-03-01 2014-03-18 Broadcom Corporation Method of timebase management for MPEG decoding with personal video recording functionality
    US8578411B1 (en) 2003-03-14 2013-11-05 Tvworks, Llc System and method for controlling iTV application behaviors through the use of application profile filters
    US7197715B1 (en) * 2002-03-29 2007-03-27 Digeo, Inc. System and method to provide customized graphical user interfaces via an interactive video casting network
    KR20030087193A (en) 2002-05-07 2003-11-14 엘지전자 주식회사 Method for managing a multi-channel broadcast stream record
    US8707354B1 (en) 2002-06-12 2014-04-22 Tvworks, Llc Graphically rich, modular, promotional tile interface for interactive television
    CA2462070C (en) 2002-06-21 2012-03-20 Lg Electronics Inc. Recording medium having data structure for managing reproduction of video data recorded thereon
    AU2003241198B2 (en) 2002-06-21 2009-09-03 Lg Electronics Inc. Recording medium having data structure for managing reproduction of video data recorded thereon
    JP4418747B2 (en) 2002-06-24 2010-02-24 エルジー エレクトロニクス インコーポレイティド A recording medium having a navigation control information contains a data structure for managing reproduction of video data, recording and reproducing method and apparatus according to it
    CN101350214B (en) 2002-06-24 2015-07-01 Lg电子株式会社 Method and device for recording and reproducing data structure of reproduction for video data
    KR20040000290A (en) 2002-06-24 2004-01-03 엘지전자 주식회사 Method for managing multi-path data stream of high density optical disc
    JP4431043B2 (en) 2002-10-14 2010-03-10 エルジー エレクトロニクス インコーポレイティド An optical disc having a data structure for managing reproduction of the recorded plurality of audio streams, recording and reproducing method and apparatus according to it
    WO2004036578A1 (en) 2002-10-15 2004-04-29 Lg Electronics Inc. Recording medium having data structure for managing reproduction of multiple graphics streams recorded thereon and recording and reproducing methods and apparatuses
    US7693394B2 (en) * 2003-02-26 2010-04-06 Lg Electronics Inc. Recording medium having data structure for managing reproduction of data streams recorded thereon and recording and reproducing methods and apparatuses
    US7809775B2 (en) 2003-02-27 2010-10-05 Lg Electronics, Inc. Recording medium having data structure for managing playback control recorded thereon and recording and reproducing methods and apparatuses
    EP1604356A4 (en) 2003-02-28 2009-12-16 Lg Electronics Inc Recording medium having data structure for managing random/shuffle reproduction of video data recorded thereon and recording and reproducing methods and apparatuses
    US7818667B2 (en) 2005-05-03 2010-10-19 Tv Works Llc Verification of semantic constraints in multimedia data and in its announcement, signaling and interchange
    KR101014664B1 (en) * 2003-03-28 2011-02-16 삼성전자주식회사 Reproduction method for guaranteeing seamless reproduction of a plurality of data streams and reproducing apparatus therefor
    JP2006524952A (en) * 2003-03-28 2006-11-02 サムスン エレクトロニクス カンパニー リミテッド Reproducing method and reproducing apparatus to ensure continuous playback between data streams
    US7620301B2 (en) * 2003-04-04 2009-11-17 Lg Electronics Inc. System and method for resuming playback
    US7703116B1 (en) 2003-07-11 2010-04-20 Tvworks, Llc System and method for construction, delivery and display of iTV applications that blend programming information of on-demand and broadcast service offerings
    US8819734B2 (en) 2003-09-16 2014-08-26 Tvworks, Llc Contextual navigational control for digital television
    JP2006164378A (en) * 2004-12-06 2006-06-22 Toshiba Corp Information recording medium, information recording method, information reproducing method, information recording device, information reproducing device
    US20060271990A1 (en) * 2005-05-18 2006-11-30 Rodriguez Arturo A Higher picture rate HD encoding and transmission with legacy HD backward compatibility
    CN100438618C (en) 2005-08-08 2008-11-26 乐金电子(中国)研究开发中心有限公司 CI interface data transmission method based on time standard
    JP2009521164A (en) * 2005-12-23 2009-05-28 コーニンクレッカ フィリップス エレクトロニクス エヌ ヴィ Processing apparatus and processing method of the input data stream and an input frame sequence
    EP2145471A4 (en) * 2007-04-04 2011-03-30 Korea Electronics Telecomm Storage/playback method and apparatus for mpeg-2 transport stream based on iso base media file format
    JP4986228B2 (en) * 2007-06-27 2012-07-25 Kddi株式会社 Receiving a packet including streaming data and receiving apparatus and a program for reproducing the same time
    US8457214B2 (en) 2007-09-10 2013-06-04 Cisco Technology, Inc. Video compositing of an arbitrary number of source streams using flexible macroblock ordering
    US8165199B2 (en) * 2007-10-18 2012-04-24 Texas Instruments Incorporated Method and apparatus for on-chip voltage controlled oscillator function
    WO2009151789A2 (en) 2008-04-17 2009-12-17 Sony Corporation Dual-type of playback for multimedia content
    EP2472866A1 (en) * 2011-01-04 2012-07-04 Alcatel Lucent Method for providing an HTTP adaptive streaming service
    US9112623B2 (en) 2011-06-06 2015-08-18 Comcast Cable Communications, Llc Asynchronous interaction at specific points in content
    US9553927B2 (en) 2013-03-13 2017-01-24 Comcast Cable Communications, Llc Synchronizing multiple transmissions of content
    JP6232870B2 (en) * 2013-09-11 2017-11-22 株式会社リコー Wireless communication system, radio communication method, a program, and a recording medium
    US9736521B2 (en) 2013-12-23 2017-08-15 Qualcomm Incorporated Using timed transport stream for receiver-side inter-device communication
    US9667885B2 (en) * 2014-12-12 2017-05-30 Futurewei Technologies, Inc. Systems and methods to achieve interactive special effects

    Citations (8)

    * Cited by examiner, † Cited by third party
    Publication number Priority date Publication date Assignee Title
    EP0794667A2 (en) * 1992-09-22 1997-09-10 Sony Corporation Digital video signal processing apparatus and method
    WO1998017024A1 (en) * 1996-10-11 1998-04-23 Sarnoff Corporation Apparatus and method for analyzing bitstreams
    US5751721A (en) * 1995-03-29 1998-05-12 U.S. Philips Corporation System for adjusting timing of output data in response to potential discontinuities in a timing signal
    US5805602A (en) * 1995-09-25 1998-09-08 Bell Atlantic Network Services, Inc. Network monitoring system for cell delay variation
    US5838876A (en) * 1996-09-24 1998-11-17 Sony Corporation Frame-accurate edit and playback in digital stream recording
    WO1999008285A1 (en) 1997-08-05 1999-02-18 Aplus Flash Technology, Inc. Method for preventing sub-threshold leakage in flash memory cells
    EP0942603A2 (en) * 1998-03-09 1999-09-15 Sony Corporation Video splicing apparatus and video splicing method
    US5966385A (en) * 1995-03-29 1999-10-12 Hitachi, Ltd. Decoder for compressed and multiplexed video and audio data

    Family Cites Families (21)

    * Cited by examiner, † Cited by third party
    Publication number Priority date Publication date Assignee Title
    JP3264290B2 (en) * 1992-09-22 2002-03-11 ソニー株式会社 Decoding method and a decoding apparatus
    US5420866A (en) * 1994-03-29 1995-05-30 Scientific-Atlanta, Inc. Methods for providing conditional access information to decoders in a packet-based multiplexed communications system
    GB9424429D0 (en) * 1994-12-02 1995-01-18 Philips Electronics Uk Ltd Audio/video timing discrepancy management
    WO1996029822A1 (en) * 1995-03-20 1996-09-26 Matsushita Electric Industrial Co., Ltd. Device and method for recording picture information
    CN1070335C (en) 1995-03-21 2001-09-05 洋马农机株式会社 Combine
    US5793927A (en) * 1995-06-07 1998-08-11 Hitachi America, Ltd. Methods for monitoring and modifying a trick play data stream to insure MPEG compliance
    GB9512068D0 (en) * 1995-06-14 1995-08-09 Thomson Consumer Electronics Bus and interface system for consumer digital equipment
    US5703877A (en) * 1995-11-22 1997-12-30 General Instrument Corporation Of Delaware Acquisition and error recovery of audio data carried in a packetized data stream
    US6169843B1 (en) * 1995-12-01 2001-01-02 Harmonic, Inc. Recording and playback of audio-video transport streams
    JPH10200854A (en) * 1997-01-13 1998-07-31 Sony Corp Recorder, reproducing device and recording and reproducing device
    WO1998043423A1 (en) * 1997-03-25 1998-10-01 Sony Corporation Transport stream generating device and method, and program transmission device
    US6356567B2 (en) * 1997-09-26 2002-03-12 International Business Machines Corporation Embedded clock recovery and difference filtering for an MPEG-2 compliant transport stream
    JP3418966B2 (en) * 1997-10-09 2003-06-23 インターナショナル・ビジネス・マシーンズ・コーポレーション Synchronization method and a decoder
    US6697566B2 (en) * 1997-10-17 2004-02-24 Sony Corporation Encoded signal characteristic point recording apparatus
    JP3666625B2 (en) 1998-03-20 2005-06-29 パイオニア株式会社 Data recording method and data recording apparatus
    BR9910276A (en) 1998-05-08 2001-10-02 Koninkl Philips Electronics Nv Processes to record and to reproduce one or more audio programs and / or digital video, and recording and playback devices
    CN1138270C (en) 1998-06-05 2004-02-11 皇家菲利浦电子有限公司 Recording and reproduction of information signal in/from track on record carrier
    KR100345235B1 (en) * 1998-11-08 2005-07-29 엘지전자 주식회사 Method and apparatus for re-cording digital data streams
    EP1021048A3 (en) 1999-01-14 2002-10-02 Kabushiki Kaisha Toshiba Digital video recording system and its recording medium
    JP4389365B2 (en) * 1999-09-29 2009-12-24 ソニー株式会社 Transport stream recording apparatus and method, a transport stream reproducing apparatus and method, and a program recording medium
    CN1606357A (en) 2000-01-10 2005-04-13 皇家菲利浦电子有限公司 Method of setting system time clock at start of mpeg sequence

    Patent Citations (8)

    * Cited by examiner, † Cited by third party
    Publication number Priority date Publication date Assignee Title
    EP0794667A2 (en) * 1992-09-22 1997-09-10 Sony Corporation Digital video signal processing apparatus and method
    US5966385A (en) * 1995-03-29 1999-10-12 Hitachi, Ltd. Decoder for compressed and multiplexed video and audio data
    US5751721A (en) * 1995-03-29 1998-05-12 U.S. Philips Corporation System for adjusting timing of output data in response to potential discontinuities in a timing signal
    US5805602A (en) * 1995-09-25 1998-09-08 Bell Atlantic Network Services, Inc. Network monitoring system for cell delay variation
    US5838876A (en) * 1996-09-24 1998-11-17 Sony Corporation Frame-accurate edit and playback in digital stream recording
    WO1998017024A1 (en) * 1996-10-11 1998-04-23 Sarnoff Corporation Apparatus and method for analyzing bitstreams
    WO1999008285A1 (en) 1997-08-05 1999-02-18 Aplus Flash Technology, Inc. Method for preventing sub-threshold leakage in flash memory cells
    EP0942603A2 (en) * 1998-03-09 1999-09-15 Sony Corporation Video splicing apparatus and video splicing method

    Non-Patent Citations (2)

    * Cited by examiner, † Cited by third party
    Title
    "INFORMATION TECHNOLOGY - GENERIC CODING OF MOVING PICTURES AND ASSOCIATED AUDIO INFORMATION: SYSTEMS. TECHNOLOGIES DE L'INFORMATION - CODAGE DES IMAGES ANIMEES ET DU SON ASSOCIE: SYSTEMES", INTERNATIONAL STANDARD ISO/IEC, XX, XX, vol. 13818-1, 15 April 1996 (1996-04-15), pages I - XY,01, XP000667435 *
    HURST ET AL: "MPEG Splicing - Tutorial and Proposed SMPTE Standard", PROCEEDINGS OF THE SMPTE TECHNICAL CONFERENCE,XX,XX, November 1997 (1997-11-01), pages 105 - 117, XP002098562 *

    Also Published As

    Publication number Publication date
    US8098973B2 (en) 2012-01-17
    WO2001052554A1 (en) 2001-07-19
    CN1364387A (en) 2002-08-14
    US20120082433A1 (en) 2012-04-05
    EP1163802A1 (en) 2001-12-19
    CN1316831C (en) 2007-05-16
    JP2011082992A (en) 2011-04-21
    EP1926323A3 (en) 2008-06-25
    MY147128A (en) 2012-10-31
    CN1227912C (en) 2005-11-16
    US8942539B2 (en) 2015-01-27
    CN1606356A (en) 2005-04-13
    BR0103897A (en) 2001-12-26
    ES2601140T3 (en) 2017-02-14
    CN1606355A (en) 2005-04-13
    JP2003520514A (en) 2003-07-02
    EP1936999B1 (en) 2016-12-21
    JP4773664B2 (en) 2011-09-14
    PL354840A1 (en) 2004-02-23
    BRPI0103897B1 (en) 2015-07-28
    EP1163802B1 (en) 2016-08-31
    CN1606357A (en) 2005-04-13
    PL222487B1 (en) 2016-08-31
    EP1926323A2 (en) 2008-05-28
    US20030058948A1 (en) 2003-03-27

    Similar Documents

    Publication Publication Date Title
    US7965766B2 (en) Stream generation apparatus, stream generation method, coding apparatus, coding method, recording medium and program thereof
    US6912251B1 (en) Frame-accurate seamless splicing of information streams
    KR100376633B1 (en) Data decoding apparatus and method
    US6330392B1 (en) Video data editing apparatus and computer-readable recording medium storing an editing program
    US6363212B1 (en) Apparatus and method for encoding and decoding digital video data
    JP4737572B2 (en) Data recording medium
    CN100431354C (en) Method and apparatus for editing digital video recordings, and recordingds made by such methods
    US8401376B2 (en) Information recording apparatus and method for the same
    US6031960A (en) Methods for modifying a video data stream by adding headers to facilitate the identification of packets including a PCR, PTS or DTS value
    US5737479A (en) Apparatus and method for inserting rating code into the digital video signal
    US7403567B2 (en) Decoding method and apparatus and recording method and apparatus for moving picture data
    JP4150083B2 (en) Encoded stream generating apparatus and method and an editing system and method,
    US7760990B2 (en) Recording apparatus, recording method, playback apparatus, playback method and recording media, including recorded list of random access points
    CN1150543C (en) Data coding/decoding method and apparatus and coded data recording medium
    US7184647B2 (en) Information carrier, device for reading and device for providing the information carrier and method of transmitting picture information
    US7843994B2 (en) Moving picture stream generation apparatus, moving picture coding apparatus, moving picture multiplexing apparatus and moving picture decoding apparatus
    CN1223188C (en) Methods and apparatus for making and replaying digital video recordings, and recordings made by such method
    CN1144456C (en) Device and method for digital data recording/rendition
    US20050203927A1 (en) Fast metadata generation and delivery
    EP0910087B1 (en) Recording apparatus and method, reproducing apparatus and method, recording/reproducing apparatus and method, recording medium and distribution medium
    CN100358345C (en) Block data form for digital data storage medium
    KR100984638B1 (en) Robust method for achieving audio/video synchronization in mpeg decoders in personal video recording applications
    JP4484870B2 (en) Method and apparatus function to create an extended digital video disc
    US5838872A (en) Image information recording apparatus and image information recording method
    EP1040479B1 (en) Frame-accurate editing of encoded a/v sequences

    Legal Events

    Date Code Title Description
    AC Divisional application: reference to earlier application

    Ref document number: 1163802

    Country of ref document: EP

    Kind code of ref document: P

    AK Designated contracting states

    Kind code of ref document: A1

    Designated state(s): DE ES FR GB IT

    17P Request for examination filed

    Effective date: 20081229

    AKX Designation fees paid

    Designated state(s): DE ES FR GB IT

    17Q First examination report despatched

    Effective date: 20090211

    RAP1 Rights of an application transferred

    Owner name: KONINKLIJKE PHILIPS N.V.

    REG Reference to a national code

    Ref country code: DE

    Ref legal event code: R079

    Ref document number: 60150258

    Country of ref document: DE

    Free format text: PREVIOUS MAIN CLASS: H04N0007620000

    Ipc: H04N0021430000

    RIC1 Information provided on ipc code assigned before grant

    Ipc: H04N 21/434 20110101ALI20160208BHEP

    Ipc: H04N 21/43 20110101AFI20160208BHEP

    Ipc: H04N 21/433 20110101ALI20160208BHEP

    Ipc: H04N 21/845 20110101ALI20160208BHEP

    Ipc: H04N 21/4147 20110101ALI20160208BHEP

    Ipc: H04N 21/242 20110101ALI20160208BHEP

    INTG Intention to grant announced

    Effective date: 20160330

    AK Designated contracting states

    Kind code of ref document: B1

    Designated state(s): DE ES FR GB IT

    REG Reference to a national code

    Ref country code: GB

    Ref legal event code: FG4D

    AC Divisional application: reference to earlier application

    Ref document number: 1163802

    Country of ref document: EP

    Kind code of ref document: P

    REG Reference to a national code

    Ref country code: FR

    Ref legal event code: PLFP

    Year of fee payment: 17

    REG Reference to a national code

    Ref country code: DE

    Ref legal event code: R084

    Ref document number: 60150258

    Country of ref document: DE

    REG Reference to a national code

    Ref country code: DE

    Ref legal event code: R096

    Ref document number: 60150258

    Country of ref document: DE

    PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

    Ref country code: IT

    Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

    Effective date: 20161221

    Ref country code: ES

    Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

    Effective date: 20161221

    REG Reference to a national code

    Ref country code: DE

    Ref legal event code: R097

    Ref document number: 60150258

    Country of ref document: DE

    26N No opposition filed

    Effective date: 20170922

    REG Reference to a national code

    Ref country code: FR

    Ref legal event code: PLFP

    Year of fee payment: 18

    PGFP Annual fee paid to national office [announced from national office to epo]

    Ref country code: FR

    Payment date: 20190128

    Year of fee payment: 19

    Ref country code: GB

    Payment date: 20190130

    Year of fee payment: 19

    PGFP Annual fee paid to national office [announced from national office to epo]

    Ref country code: DE

    Payment date: 20190401

    Year of fee payment: 19